/*
 * This file belongs to the Galois project, a C++ library for exploiting parallelism.
 * The code is being released under the terms of the 3-Clause BSD License (a
 * copy is located in LICENSE.txt at the top-level directory).
 *
 * Copyright (C) 2018, The University of Texas at Austin. All rights reserved.
 * UNIVERSITY EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES CONCERNING THIS
 * SOFTWARE AND DOCUMENTATION, INCLUDING ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR ANY PARTICULAR PURPOSE, NON-INFRINGEMENT AND WARRANTIES OF
 * PERFORMANCE, AND ANY WARRANTY THAT MIGHT OTHERWISE ARISE FROM COURSE OF
 * DEALING OR USAGE OF TRADE.  NO WARRANTY IS EITHER EXPRESS OR IMPLIED WITH
 * RESPECT TO THE USE OF THE SOFTWARE OR DOCUMENTATION. Under no circumstances
 * shall University be liable for incidental, special, indirect, direct or
 * consequential damages or loss of profits, interruption of business, or
 * related expenses which may arise from use of Software or Documentation,
 * including but not limited to those resulting from defects in Software and/or
 * Documentation, or loss or inaccuracy of data of any kind.
 */

#ifndef _KRUSKAL_SERIAL_H_
#define _KRUSKAL_SERIAL_H_

#include "kruskalData.h"
#include "kruskalFunc.h"
#include "kruskal.h"

class KruskalSerial : public Kruskal<KNode> {
protected:
  virtual const std::string getVersion() const {
    return "Serial Ordered Kruskal";
  }

  virtual void runMST(VecKNode_ty& nodes, VecKEdge_ty& edges, size_t& mstWeight,
                      size_t& totalIter) {

    std::sort(edges.begin(), edges.end(), KEdge<KNode>::PtrComparator());

    size_t mstSum    = 0;
    size_t iter      = 0;
    size_t numUnions = 0;

    for (VecKEdge_ty::const_iterator i = edges.begin(), ei = edges.end();
         i != ei; ++i) {

      ++iter;

      if (kruskal::contract(**i)) {
        ++numUnions;
        mstSum += (*i)->weight;
      }

      if (numUnions == (nodes.size() - 1)) {
        break;
      }
    }

    mstWeight = mstSum;
    totalIter = iter;
  }
};

#endif // _KRUSKAL_SERIAL_H_
